Famous people are supposed to be somewhere else, invisible to us. Comedian Tig Notaro tells this story about repeatedly running into Taylor Dayne, who was a pop star in the late 80s and early 90s.
Ira Glass's sister once met David Sedaris, and commented that he was much nicer than she thought he would be, given his writing. David replied, "I'm not nice, just two-faced." In this story, David shares the thoughts running through his head as he attempts to buy a cup of coffee.